I don't have log files, but I will try to figure out by bitrates and handbrake version. These were all my earliest encodes, so there are some which were on a previous version of Handbrake. My earliest encodes were done earlier this year on a Windows laptop, and somewhere in that timeline I switched from XP to Vista as well. Lots of variables and I can't pinpoint all the changes. Of course these movies being the first I encoded were my favorite movies and now they can only play on the ATV. I would redo them, but I'm hoping to get them all in HD before long... If only Disney/Vista would release Tombstone already!